Poll: Democrats Obama, Baldwin lead in Wis.

President Obama has stretched his lead in Wisconsin over Republican challenger Mitt Romney, according to a poll released Wednesday.

A new Marquette University Law School poll shows the president with a lead of 51 percent to 43 percent among likely Wisconsin voters, giving him his largest lead in the Badger State since last September.

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The poll also found that Democratic Rep. Tammy Baldwin is leading in the state’s U.S. Senate race, 47 percent to 43 percent over Republican former Gov. Tommy Thompson.

Mr. Obama has been favored to win Wisconsin throughout much of the campaign, but some recent polls have shown Mr. Romney within striking distance.

A poll this week by Rasmussen Reports showed the race as tied, and a mid-October poll by Marquette had Mr. Obama with just a 1-percentage-point lead. No GOP presidential nominee has won the state since 1984.

In the Senate race, Ms. Baldwin is trying to break a string of major GOP victories in Wisconsin which include Sen. Ron Johnson’s win in 2010 and Gov. Scott Walker’s election victories in 2010 and this year.

She and Mr. Thompson have been close in recent polls, with Rasmussen showing Mr. Thompson as a 1-point favorite earlier this week.